Related how?

Biota (Life)
Eukaryote (Eukarya)
Diaphoretickes (Plants+hc+sar megagroup)
Archaeplastida
Plant (Green plants)
Viridiplantae (Chlorobiota)
Streptophyta (Streptophytina)
Embryophyte (Land plants)
Tracheophyta (Higher plants)
Polypodiophyta
Polypodiophytina
Polypodiopsida (Pteridopsida)
Polypodiidae (Leptosporangiate fern)
Polypodiales
Pteridineae
Pteridaceae

Parkerioideae (5304267)

Children (2 direct children, 387 direct and indirect children):

Acrostichum (tree size 369)
Leatherfern

Ceratopteris (tree size 16)
Antlerfern